To find out how dogs reacted to human speech, researchers had 30 female volunteers read a script while looking at pictures of dogs — both puppies and adults. (tampabayvets.net)
6 female volunteers shared one room, a bathroom and a fridge in the basement. (workingabroad.com)
One study with 16 young, healthy female volunteers who fasted for 48 hours had elevated cortisol levels, suggesting fasting could create additional stress. (mindbodygreen.com)